LOW-TEMPERATURE AGING BEHAVIOR OF QUENCHED CU-AL-BE SHAPE-MEMORY ALLOY

Positron lifetime measurements are used to obtain the concentration of quenched-in Feint defects for different quenching temperatures and to determine their subsequent time evolution at room temperature, The co rresponding: evolution of the transition temperature after the quench has also been measured by calorimetry. The fact that both quantities f ollow comparable time evolutions corroborates the claim that vacancies are responsible for the observed changes in the martensitic transitio n properties after quenching.